CN103785906A - Machine tool - Google Patents
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- CN103785906A CN103785906A CN201310520511.1A CN201310520511A CN103785906A CN 103785906 A CN103785906 A CN 103785906A CN 201310520511 A CN201310520511 A CN 201310520511A CN 103785906 A CN103785906 A CN 103785906A
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- Prior art keywords
- speed
- cutter
- path
- cutting
- lathe
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/02—Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses
- B23G1/04—Machines with one working-spindle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G3/00—Arrangements or accessories for enabling machine tools not specially designed only for thread cutting to be used for this purpose, e.g. arrangements for reversing the working spindle
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/49—Nc machine tool, till multiple
- G05B2219/49392—Multipasses, segmentation of cut, paraxial cutting
Abstract
The present invention provides a machine tool capable of reliably performing cutting in a specific tool pass at a high rotation speed. A machine tool includes a first-pass rotation speed computing section (15). The first-pass rotation speed computing section (15) automatically decides whether the main spindle rotation speed in the first pass should be a high rotation speed or a low rotation speed so that cutting in the last tool pass is performed at the high rotation speed. Thus, cutting of the last tool pass at the low rotation speed can be reliably prevented.
Description
Technical field
The present invention relates to for example can carry out the lathes such as the lathe of screw chasing processing.
Background technology
Using lathe to add man-hour (especially the workpiece of low rigidity is being processed or utilized the cutter of low rigidity to add man-hour), there is following existing issue: work in-process produces the fierceness vibration that is known as flutter often, produce so-called chatter mark, cutter at machined surface and collapse scarce etc.Therefore, for example as disclosed in Patent Document 1, following technology has been proposed: by change the speed of mainshaft in screw chasing fabrication cycles, suppress above-mentioned such flutter.In addition, applicant is before the application of this part, following technology is proposed: by change the speed of mainshaft with path unit in screw chasing fabrication cycles, make the screw chasing chamfering in whole paths identical, can suppress the increase (patent application 2012-121107) of cutting load.
Prior art document
Patent documentation 1: TOHKEMY 2004-209558 communique
Summary of the invention
But, in the case of like that alternately carrying out according to above-mentioned prior art the cutting under cutting and the high speed rotating speed under low rotation speed, because the cutting under known high speed rotating speed is rule of thumb not easy to produce flutter, thereby in the time that easily to produce the cutter path of the specific time of flutter be known, expect that the cutting in this cutter path of the specific time is high speed rotating speed.In addition, especially, if consider machined surface precision, expect that the cutting in final cutter path is also high speed rotating speed.But, the in the situation that of every multiple route diversion speed of mainshaft, owing to being difficult to know that to be made as which in low speed/high speed good by starting the speed of mainshaft in initial cutting together with processing, thereby carry out the cutting in cutter path or the final cutter path of the specific time with low rotation speed, thereby exist and can not effectively suppress the problem that flutter, machined surface precision likely worsen.
Therefore, the present invention completes in view of the above problems, and a kind of lathe is provided, and can carry out the cutting in specific inferior cutter path with high speed rotating speed reliably.
In order to achieve the above object, the invention described in the first aspect in the present invention is a kind of lathe, and this lathe has: grasping device, and it is provided with the workpiece of axle shape, cutter, it can the radial and axial movement along described workpiece with respect to described workpiece, machining control unit, it makes described workpiece and axis relative rotate of described cutter around described workpiece on one side, repeating following cutter path carries out screw chasing processing on one side, and above-mentioned cutter path is: make described cutter cut and move, then make described cutter to leave along radial direction along the direction parallel with the axle of described workpiece along radial direction with respect to described workpiece, rotary speed controling unit, its can take cutter path as unit changes described rotating speed, and speed calculation unit, relative rotation speed between its described workpiece and described cutter to each described cutter path calculates, described lathe is characterised in that, described rotary speed controling unit changes described rotating speed according to predetermined high speed rotating speed and predetermined low rotation speed, on the other hand, described lathe has specific rotation speeds calculating part, this specific rotation speeds calculating part determines the described rotating speed in the 1st cutter path to be made as which in described high speed rotating speed and described low rotation speed, make to carry out the cutter path of the specific time in described screw chasing processing with described high speed rotating speed.
Invention described in second aspect is characterised in that, in the invention described in first aspect, the cutter path of described the specific time is the final cutter path in described screw chasing processing.
Invention described in the third aspect is characterised in that, first or second aspect described in invention in, described machining control unit can carry out described screw chasing processing under the different multiple cutting mode of the cut-in manner of described cutter, sets twolip cutting mode, single-blade cutting mode and staggered cutting pattern as described cutting mode.
According to the present invention, there is specific rotation speeds calculating part, this specific rotation speeds calculating part determines the rotating speed in the 1st cutter path to be made as which in high speed rotating speed and low rotation speed, make to carry out the cutter path of the specific time in screw chasing processing with high speed rotating speed, therefore for example in the time that easily the such cutter path of the specific time of generation flutter is known, can easily carry out this cutter path of the specific time with high speed rotating speed, can more easily suppress flutter.
In addition, according to the invention described in second aspect, owing to can easily and carry out reliably the cutting of final cutter path with high speed rotating speed, therefore can prevent reliably machined surface precision deterioration etc. owing to carrying out with low rotation speed the problem that the cutting in final cutter path causes.
Accompanying drawing explanation
Fig. 1 is the integrally-built key diagram that lathe is shown.
Fig. 2 is the key diagram that an example of the cutter path in the screw chasing fabrication cycles of lathe is shown.
Fig. 3 is the key diagram that is illustrated in a mode of the state that changes the speed of mainshaft in screw chasing cyclic process.
Fig. 4 illustrates the cutter path separately of twolip cutting mode, single-blade cutting mode and these 3 kinds of cutting modes of staggered cutting pattern and the key diagram from the affected amplitude of machined surface before.
Fig. 5 illustrates that the cutting in final cutter path becomes the key diagram of the alter mode of the speed of mainshaft of the cutting of high speed rotating speed.
Fig. 6 is the integrally-built key diagram that the lathe of distortion embodiment is shown.
Label declaration
1, 21 ‥ lathes (lathe), 2 ‥ main shafts (rotating shaft), 3 ‥ chucks (grasping device), 4 ‥ pawls, 5 ‥ workpiece, 6 ‥ encoders, 7 ‥ motors, 9 ‥ main shaft control parts (rotary speed controling unit), 10, 22 ‥ Lathe control portions (machining control unit), 11 ‥ input blocks, 12 ‥ storage parts, 13 ‥ speed calculation units, 14 ‥ same rotational speed cutting paths are counted calculating part, the 1st path speed calculation units of 15 ‥ (specific rotation speeds calculating part), 16 ‥ direction of vibration detection units, 17 ‥ cutting mode determination sections, 18 ‥ vibrating sensors (vibration detecting unit), 19 ‥ cutters, 20 ‥ knife rests.
The specific embodiment
Below, with reference to the accompanying drawings, the lathe as an embodiment of the invention is elaborated.
First, according to Fig. 1, the overall structure of lathe 1 is described, lathe 1 has chuck 3 at the front end of main shaft 2, and chuck 3 has pawl 4, can utilize this chuck 3 to control the workpiece 5 of axle shape.In addition main shaft 2 is supported in the fast headstock 8 for rotating, be built-in with for making motor 7 that main shaft 2 rotates and the encoder 6 for detection of the speed of mainshaft of main shaft 2.
On the other hand, the 9th, for monitoring the speed of mainshaft of main shaft 2 by encoder 6 and controlling the main shaft control part of the speed of mainshaft of main shaft 2.In addition, the 10th, the Lathe control portion of the action of control lathe 1 entirety, above-mentioned main shaft control part 9 and input block 11, storage part 12, speed calculation unit 13, same rotational speed cutting path is counted calculating part 14 and is connected with the 1st path speed calculation unit 15, wherein, input block 11 is used to indicate setting cutting mode, change the speed of mainshaft, storage part 12 is stored procedure etc., speed calculation unit 13 calculates the speed of mainshaft, same rotational speed cutting path is counted calculating part 14 and is determined same rotational speed cutting path number (continuing the number of path of cutting under the identical speed of mainshaft), the 1st time path speed calculation unit 15 calculates for the speed of mainshaft in the path to initial (the 1st path), make the cutting of final cutter path become the cutting under high speed rotating speed.And, in lathe 1, except control the rotating speed (being the speed of mainshaft) of workpiece 5 by main shaft control part 9, for making cutter 19 along the side face incision of the workpiece 5 in rotation and making workpiece 5 and cutter 19 along rotating shaft direction and the such processing action of radial feed, also controlled by known structure.
Next,, according to Fig. 2, an example of the cutter path in the screw chasing fabrication cycles of the processing as lathe 1 mode is described.
In above-mentioned lathe 1, by by cutter path as described below (in Fig. 2, illustrated by arrow) also repeatedly carry out processing bolt as 1 circulation: according to the procedure of storage in storage part 12, under the control of main shaft control part 9, provide electric power to motor 7, make main shaft 2 with the speed of mainshaft rotation of being scheduled to, workpiece 5 be rotated around axis, and, under the control of Lathe control portion 10, make to be fixed on the cutter 19 of knife rest 20 along the radially incision of workpiece 5, and alongst (rotating shaft direction) feeding, carry out the processing of bolt part A, then make cutter 19 along radially leaving.
In addition, in the screw chasing cyclic process of lathe 1, loop change according to predetermined, the speed of mainshaft is made as to low speed or is made as at a high speed.At this, schematic illustration changes a mode of the state of the speed of mainshaft in screw chasing cyclic process.
Operator inputs in advance by input block 11, and S0 is reference rotation speed, and W is that the speed of mainshaft changes amplitude.And speed calculation unit 13, according to these parameters, utilizes following formula (1) to calculate high speed rotating speed SH and low rotation speed SL, for every 1 path, the speed of mainshaft is changed to some (Fig. 3) in high speed rotating speed SH or low rotation speed SL.Thus, compared with the situation of All Paths being cut with the constant speed of mainshaft, can suppress the growth of flutter.
S
h: the speed of mainshaft [min of high-speed side
-1]
S
l: the speed of mainshaft [min of low speed side
-1]
S
0: reference rotation speed [min
-1]
W: the speed of mainshaft changes amplitude [%]
Herein, the decision of being counted the same rotational speed cutting path number that calculating part 14 carries out by same rotational speed cutting path is described.In addition,, in lathe 1, as the embodiment of cutting mode (being the cut-in manner of cutter path), can set these 3 kinds of cutting modes of twolip cutting mode, single-blade cutting mode and staggered cutting pattern.In addition, Fig. 4 illustrates the cutter path separately of above-mentioned 3 kinds of cutting modes and the key diagram from the affected amplitude of machined surface (following, to be called reproduction amplitude) before.
Twolip cutting mode shown in Fig. 4 (a) is the cutting mode that the cutting edge of the left and right sides (left and right sides of Fig. 2) that utilizes the point of a knife of cutter 19 cuts, minimum v in Fig. 4 (a) is literal is the cutter path in the 1st path, along with the carrying out of processing, it is literal that cutter path changes larger v gradually into, and maximum v is literal is the cutter path in the 10th path.Therefore, the processing in the n time path in twolip cutting mode is only subject to the impact of the machined surface in the n-1 time path, and the reproduction amplitude before 1 path in the processing in the 10th path is the bd1a in Fig. 4 (a).
In addition, single-blade cutting mode shown in Fig. 4 (b) is the cutting mode that utilizes the cutting edge in the left side of the point of a knife of cutter 19 to cut, the less v of the rightmost side in Fig. 4 (b) is literal is the cutter path in the 1st path, along with the carrying out of processing, it is literal that cutter path changes the v on inclined plane that comprises left side gradually into, and the larger v word on the inclined plane that comprises the leftmost side is the cutter path in the 10th path.Therefore, in the processing in the n time path in single-blade cutting mode, be also only subject to the impact of the machined surface in the n-1 time path, the reproduction amplitude before 1 path in the processing in the 10th path is the bd1b in Fig. 4 (b).
On the other hand, staggered cutting pattern shown in Fig. 4 (c) is the cutting mode that every 1 path alternately utilizes the cutting edge of the left and right of cutter 19 to cut, minimum v in Fig. 4 (c) is literal is the cutter path in the 1st path, along with the carrying out of processing, cutter path changes that alternately to comprise the v on lateral tilting inclined-plane literal into, and the v that comprises maximum inclined plane, left and right is literal is the cutter path in the 10th path.Therefore, the processing in the n time path in staggered cutting pattern is subject to the impact of the machined surface in the n-1 time path and the machined surface in the n-2 time path, reproduction amplitude before 1 path in the processing in the 10th path is the bd1c in Fig. 4 (c), and the reproduction amplitude before 2 paths is the bd2c in Fig. 4 (c)., consider the relation between reproduction amplitude and flutter herein, reproduction amplitude is larger to be more easily subject to the impact of previous machined surface and to produce flutter.Therefore,, in staggered rotary cut pattern, because the reproduction amplitude before 2 paths is greater than the reproduction amplitude before path 1 time, thereby can say and be easily subject to the impact of 2 machined surfaces before path and produce flutter.
In view of above-mentioned, in lathe 1, same rotational speed cutting path is counted calculating part 14 and is differentiated according to the procedure of setting etc. the cutting mode that screw chasing is processed, if set staggered cutting pattern as cutting mode, same rotational speed cutting path number is made as to " 2 ", on the other hand, as cutting mode, same rotational speed cutting path number is made as to " 1 " if set twolip cutting mode and single-blade cutting mode (being the cutting mode beyond staggered cutting pattern).
The calculating of the speed of mainshaft in the 1st path of next, the speed calculation unit 15 by the 1st path being carried out describes.Fig. 5 illustrates that the cutting in final cutter path becomes the key diagram of the alter mode of the speed of mainshaft of the cutting under high speed rotating speed.
C in Fig. 5 is same rotational speed cutting path number, and N always cuts number of times, in the processing shown in Fig. 5, and C=2, N=6.In addition, the P in Fig. 5 is the change cycle of the speed of mainshaft, (n) represents the order of the cutting path in P, s(n) (n=1,2 ‥, P) be the speed of mainshaft in the path of cutting in P.Herein, at s(1)～s(C) in, make main shaft 2 with high speed rotating speed SH rotation, on the other hand, at s(C+1)～s(P) in, main shaft 2 is rotated with low rotation speed SL.Like this, in the 1st path speed calculation unit 15, calculate the speed of mainshaft ss in the 1st path by following formula (2)～(4)., determine s(1)～s(C) in high speed rotating speed SH and s(C+1)～s(P) and in low rotation speed SL in which as the speed of mainshaft ss in the 1st path.
P＝2×C…（2）
nm＝（N-1）mod?P…（3）
ss＝s（P-nm＋1）…（4）
In addition, can be by total approach be calculated to total incision times N divided by the approach in every 1 path.
According to above such lathe 1, the same rotational speed cutting path with decision same rotational speed cutting path number is counted calculating part 14, differentiate the cutting mode of screw chasing processing according to the procedure of setting etc., and automatically determine optimum same rotational speed cutting path number according to cutting mode.Therefore, also easily suppress flutter even can realize unskilled operator, ease of use is good.
In addition, also having path speed calculation unit 15 the 1st time, automatically determine in order to make the cutting in final cutter path become the cutting under high speed rotating speed, is that the speed of mainshaft in the 1st path is made as to high speed rotating speed SH is good, should be made as low rotation speed SL.Therefore, can prevent from reliably carrying out the such situation of cutting in final cutter path with low rotation speed.
In addition, lathe of the present invention is not limited to the form of above-mentioned embodiment, and the overall structure of lathe is certainly like this, for alter mode of the speed of mainshaft etc., not departing from the scope of purport of the present invention, can suitably change as required.
For example, in the lathe 1 of above-mentioned embodiment, by manually setting cutting mode, but also can be configured to the vibration producing by detecting main shaft, automatically set the cutting mode that easily suppresses vibration.Below, according to Fig. 6, the lathe 21 of the distortion embodiment as such is described.In addition,, in Fig. 6, for the inscape identical with lathe 1 described in Fig. 1, mark identical label.
In above-mentioned lathe 21, automatically selecting twolip cutting mode after starting processing, by vibrating sensor 18 detect vibration in the incision direction that main shaft 2 produces and axially on vibration, in direction of vibration detection unit 16, the larger direction of vibration is judged as to the direction of easy vibration.And, in the situation that incision direction is easily vibrated, cutting mode determination section 17 selects cutting sectional area to be difficult to variation and incision direction composition (radial load) accounts for less single-blade cutting mode or the staggered cutting pattern of ratio of synthesizing cutting force, cutting mode is changed to single-blade cutting mode or staggered cutting pattern and proceeds processing from twolip cutting mode, make compared with twolip cutting mode, the cutting amplitude of observing from incision direction is less.On the other hand, in the situation that axially easily vibrating, cutting mode determination section 17 selects cutting sectional area to be difficult to variation and axial composition (direction of feed component) accounts for the less twolip cutting mode of ratio that synthesizes cutting force, do not change cutting mode and proceed processing, make in cutting mode, compare with staggered cutting pattern with single-blade cutting mode, from end on observation to cutting amplitude less.In addition, in the situation that having changed cutting mode, in the 1st path speed calculation unit 15, substitute total incision number of times and by remaining incision number of times substitution N, by above-mentioned formula (2)～(4), calculate the speed of mainshaft ss in cutting mode the 1st path after changing.In addition, in the time changing cutting mode, about which cutting mode of selecting in single-blade cutting mode and staggered cutting pattern, can be preset by operator, also can automatically determine according to procedure etc.
By as above such lathe 21, also easily suppress flutter even also can realize unskilled operator, can expect the effect identical with lathe 1, wherein, lathe 1 can prevent situation of carrying out with low rotation speed cutting in final cutter path and so on etc. reliably.
In addition, also be provided with the vibrating sensor 18 that detects the vibration that produces of main shaft 2, and there is the cutting mode determination section 17 of judging the direction of vibration detection unit 16 of the direction of easily vibrating and determining cutting mode according to the direction of easy vibration, determine to be not easy to produce the cutting mode of flutter according to the direction of easy vibration, and process under this cutting mode, therefore can further suppress flutter.
In addition, as other variation, for example, in above-mentioned embodiment and distortion embodiment, cutting in final cutter path becomes the cutting under high speed rotating speed, but owing to easily producing the reasons such as flutter, also can be configured to and not be to become the cutting under high speed rotating speed at final cutter path, but cutting in the cutter path of specific times becomes the cutting under high speed rotating speed, and the path that hope is cut with high speed rotating speed (or till remaining incision number of times in this path) is made as N, calculate the speed of mainshaft ss in the 1st path (or cutting mode the 1st path after changing) by above-mentioned formula (2)～(4).
In addition, certainly, also can be in the time changing the speed of mainshaft, its cycle is made as to every 3 paths, with 2 paths of high speed rotating speed SH processing, with 1 path of low rotation speed SL processing etc., adopt other deformation pattern different with the deformation pattern of being out of shape embodiment with above-mentioned embodiment according to cutting mode and other processing conditions etc.
In addition, the control of the screw chasing processing of above-mentioned embodiment and distortion embodiment not only can be applied to the screw chasing processing of external diameter, also can be applied to the screw chasing processing of the internal diameter in tubular position etc.
In addition, in above-mentioned embodiment and distortion embodiment, can set these 3 kinds of cutting modes of twolip cutting mode, single-blade cutting mode and staggered cutting pattern as cutting mode, but also can set in addition other cutting modes, on the contrary, even if can only set two kinds of cutting modes that comprise staggered cutting pattern, also without any problem.
In addition, in above-mentioned distortion embodiment, also can manually input cutting mode, the in the situation that of manual input, can be not according to twolip cutting mode, but start processing according to inputted cutting mode, or do not carry out the change of cutting mode.
In addition, in above-mentioned distortion embodiment, vibrating sensor 18 is built in to fast headstock 8, but certainly, also can be configured to vibrating sensor 18 is arranged to knife rest 20, detect the vibration producing in workpiece 5.
In addition, in above-mentioned embodiment and distortion embodiment, the lathe that makes workpiece rotation to an embodiment as lathe is illustrated, but can be also other lathes such as machining center as described below: by changing the rotation of main shaft and making by feed shaft that cutter is relative with workpiece to be rotated, carry out identical processing.
Claims (3)
1. a lathe, this lathe has:
Grasping device, it is provided with the workpiece of axle shape;
Cutter, it can the radial and axial movement along described workpiece with respect to described workpiece;
Machining control unit, it makes described workpiece and axis relative rotate of described cutter around described workpiece on one side, repeating following cutter path carries out screw chasing processing on one side, above-mentioned cutter path is: make described cutter with respect to described workpiece along radially incision and move along the direction parallel with the axle of described workpiece, then make described cutter along radially leaving;
Rotary speed controling unit, its can take cutter path as unit changes described rotating speed; And
Speed calculation unit, the relative rotation speed between its described workpiece and described cutter to each described cutter path calculates,
Described lathe is characterised in that,
Described rotary speed controling unit changes described rotating speed according to predetermined high speed rotating speed and predetermined low rotation speed,
On the other hand, described lathe has specific rotation speeds calculating part, this specific rotation speeds calculating part determines the described rotating speed in the 1st cutter path to be made as which in described high speed rotating speed and described low rotation speed, makes to carry out the cutter path of the specific time in described screw chasing processing with described high speed rotating speed.
2. lathe according to claim 1, is characterized in that,
The cutter path of described the specific time is the final cutter path in described screw chasing processing.
3. according to the lathe described in claim 1 or 2, it is characterized in that,
Described machining control unit can carry out described screw chasing processing under the different multiple cutting mode of the cut-in manner of described cutter, and has set twolip cutting mode, single-blade cutting mode and staggered cutting pattern as described cutting mode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012239393A JP5908386B2 (en) | 2012-10-30 | 2012-10-30 | Machine Tools |
| JP2012-239393 | 2012-10-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103785906A true CN103785906A (en) | 2014-05-14 |
| CN103785906B CN103785906B (en) | 2017-04-12 |
Family
ID=50479932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310520511.1A Active CN103785906B (en) | 2012-10-30 | 2013-10-29 | Machine tool |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9662727B2 (en) |
| JP (1) | JP5908386B2 (en) |
| CN (1) | CN103785906B (en) |
| DE (1) | DE102013221823A1 (en) |
| IT (1) | ITMI20131784A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105549542A (en) * | 2014-10-28 | 2016-05-04 | 兄弟工业株式会社 | Numerical control device |
| TWI570532B (en) * | 2014-11-26 | 2017-02-11 | 三菱電機股份有限公司 | Numeral controlling device |
| CN112805108A (en) * | 2018-10-26 | 2021-05-14 | 西铁城时计株式会社 | Machine tool and control device |
| CN113677462A (en) * | 2019-05-29 | 2021-11-19 | 西铁城时计株式会社 | Machine tool and control device for the machine tool |
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| EP3698904A1 (en) * | 2014-10-08 | 2020-08-26 | Citizen Watch Co., Ltd. | Machine tool and control device for machine tool |
| JP6289766B2 (en) * | 2015-09-10 | 2018-03-07 | シチズン時計株式会社 | Machine tool control device, machine tool |
| CN108349030A (en) * | 2015-11-05 | 2018-07-31 | 株式会社ＮｅｊｉＬａｗ | Double screw manufacturing methods and double screw fabrication schedules |
| JP6603104B2 (en) | 2015-11-09 | 2019-11-06 | オークマ株式会社 | Machine Tools |
| JP7403282B2 (en) * | 2019-11-01 | 2023-12-22 | オークマ株式会社 | Monitoring device and method for spindle rotation speed in machine tools, machine tools |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5908386B2 (en) | 2016-04-26 |
| CN103785906B (en) | 2017-04-12 |
| JP2014087888A (en) | 2014-05-15 |
| DE102013221823A1 (en) | 2014-04-30 |
| ITMI20131784A1 (en) | 2014-05-01 |
| US20140121816A1 (en) | 2014-05-01 |
| US9662727B2 (en) | 2017-05-30 |
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